Database Update and Save - WEB aspx

i have an aspx page built. I need someone to code the update and save features. Loading the dropdown controls with database info is done. ## Deliverables The web address for the form is [login to view URL] procedure User keys in their first and last name (required) and email address (required) plus additional information User clicks save if user exists in database (search for first name, last name and email match) update additional information return attendeeID else save info (all one table) return new attendee ID User makes choices for purchases using drop down lists user clicks update system saves purchase info if save successful system redirects to PayPal (already coded) else warning